r32 fault code

[gazjones]

VAG-COM Version: Release 311.2-N

Control Module Part Number: 022 906 032 CP
Component and/or Version: MOTRONIC ME7.1.1G 6463
Software Coding: 0000132
Work Shop Code: WSC 00690
1 Fault Found:
16804 - Catalyst System: Bank 1: Efficiency Below Threshold
P0420 - 001 - Upper Limit Exceeded
clearecd yesterday and its back again and so is eml! only had car 30 hours its just been mot'd so must have passed emissions just been serviced as well. any idea what problem is?
cheers gaz

 

[Bogwoppit]

Does that exhaust flap mod you have done cause any problems like this?

 

[gazjones]

nah code was on before anyway. the flap is in the passenger side tail pipe right at end of back box

 

[Bogwoppit]

According to some other forums just been reading up on sounds like cat is knackered.

Type the first code and description into google.

 

[Feel]

Has it got a high flow cat or cats on it?

 

[gazjones]

no standard i belive. as back box is oem

 

[Feel]

That code on the 1.8t usually comes up when they run a high flow cat(s), it's why stage 2 code usually disables the 2nd sensor.

So it might be the cat(s) are knackered, or it might have sports cat(s) on it.

You could try that mod that appeared on vwvortex where they space the sensor out from the exhaust so it reads less nasty stuff - I think it had limited success though.

 

[Ric 2001]

My Ibiza has this and everytime I clear the code within a couple of days is back on. Got a Milltek sports CAT on it this could be the problem.

Just read this too..
Cat efficencly below threshold is usually an exhaust leak by the post O2 sensor, and it's usually at the clamp that connects the down pipe to the rest of the exhaust. If there is even a small leak, then under deacceleration there is a pressure gradient that is created. And, then the air outside is then "sucked" back in to the exhaust system for a split second.

Try tightening the exhaust clamps, know that mine is slightly blowing from the cat to centre section.

 

[gazjones]

taking it to dealers soon so will see what they say, new cat from vw £1200
cheers for that ric